/*
 * Copyright (c) 2018, Gluon and/or its affiliates.
 * All rights reserved. Use is subject to license terms.
 *
 * This file is available and licensed under the following license:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  - Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the distribution.
 *  - Neither the name of Oracle Corporation and Gluon nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.oracle.javafx.scenebuilder.kit.editor.panel.content.guides;

import com.oracle.javafx.scenebuilder.kit.util.MathUtils;
import javafx.geometry.Point2D;

import java.util.Comparator;

class PointComparator implements Comparator<Point2D> {
    
    @Override
    public int compare(Point2D o1, Point2D o2) {
        assert o1 != null;
        assert o2 != null;

        final int result;

        if (o1 == o2) {
            result = 0;
        } else if (MathUtils.equals(o1.getX(), o2.getX()) && MathUtils.equals(o1.getY(), o2.getY())) {
            result = 0;
        } else {
            double r1 = Math.sqrt(o1.getX() * o1.getX() + o1.getY() * o1.getY());
            double r2 = Math.sqrt(o2.getX() * o2.getX() + o2.getY() * o2.getY());
            result = Double.compare(r1, r2);
        }

        return result;
    }
    
}
